PLC Communications

What is a PLC? A programmable logic controller (PLC) is a digital computer that is used in industrial automation to automate various electromechanical operations. It was created to address difficulties like high power consumption that occurred when relays were used to regulate industrial operations. It is made up of a programmable microprocessor whose program is produced on a computer and then sent to the PLC through a cable. The program is saved in the non-volatile memory of the PLC. Programmable Logic Controller(PLC) History of PLC PLCs were invented by Dick Morley in 1964. Since then PLC has revolutionized the industrial and manufacturing sectors. There is a wide range of PLC functions like timing, counting, calculating, comparing, and processing various analog signals. The fundamental advantage of a PLC over a "hard-wired" control system is that after you've programmed it, you can change it for very little money (only the cost of the programmer's work). In a hard-...